-Gets the default printer for sales_invoices. Maybe this function is not used, but
-might be useful in the next version (working in client project).
+Gets the default printer for sales_invoices. Currently this function is not called, but
+might be useful in the next version.Calling template code and Controller already expect a default:
+C<L.select_tag("", printers, title_key="description", default=SELF.default_printer_id, id="cpa_printer_id") %]>